CN108603664B

CN108603664B - Heating cooker

Info

Publication number: CN108603664B
Application number: CN201680046740.6A
Authority: CN
Inventors: 竹内淳一; 饭田正久
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2016-02-08
Filing date: 2016-08-25
Publication date: 2020-07-28
Anticipated expiration: 2036-08-25
Also published as: EP3415820A1; JP2017141994A; WO2017138172A1; EP3415820A4; EP3415820B1; JP6670623B2; CN108603664A

Abstract

A heating cooker is provided with: a heating chamber; a plurality of rollers (202) arranged on the bottom surface of the heating chamber at intervals in the circumferential direction; a connecting member (201) that connects the plurality of rollers (202); and a turntable (100) which is placed on the bottom surface of the heating chamber via a plurality of rollers (202). The turntable (100) has a first radial movement restriction section (101) that is provided on the bottom surface of the turntable (100) on the inner circumferential side of a track on which the plurality of rollers (202) roll in the circumferential direction, and that restricts the movement of the plurality of rollers (202) inward in the radial direction.

Description

Heating cooker

Technical Field

The present invention relates to a heating cooker.

Background

Conventionally, as a heating cooker, there is a heating cooker including a turntable disposed in a heating chamber and a motor for driving the turntable (see, for example, japanese patent laid-open No. 2005-300134 (patent document 1)).

In the heating cooker, the turntable is placed on the bottom surface in the heating chamber via a plurality of rollers, and a rotating shaft of a motor is connected to the center of the lower side of the turntable.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2005-300134

Disclosure of Invention

Technical problem to be solved by the invention

However, in the conventional heating cooker, since the rotary shaft of the motor is connected to the turntable, the turntable cannot be smoothly attached and detached, and the convenience is poor.

Therefore, as another conventional heating cooker, there is a heating cooker in which a turntable disposed in a heating chamber is rotatably supported by a plurality of rollers connected by a connecting member, and the connecting member connecting the plurality of rollers is driven by a rotating shaft of a motor.

In the heating cooker, since the turn table is mounted only on the plurality of rollers, the turn table can be smoothly attached and detached. However, in the heating cooker, when the food container or the like is to be taken out from the turntable after completion of cooking, if the food container including the food is heavy as a whole, the turntable may be dragged by the food container and may be separated from the plurality of rollers and fly out to the outside. In particular, in a built-in type heating cooker having a horizontal opening door, there is a possibility that a turntable which flies out to the outside may fall under a foot.

In europe and the like, it is necessary to ensure safety that the turntable does not slide down from the heating chamber under test conditions specified in IEC specification 60335-2-25 (subsimply 22.118).

Accordingly, an object of the present invention is to provide a cooking device capable of preventing a turntable from slipping off a heating chamber with a simple configuration.

Means for solving the problems

In order to solve the above problem, a heating cooker according to the present invention includes:

a heating chamber;

a plurality of rollers arranged on a bottom surface of the heating chamber at intervals in a circumferential direction;

a connecting member that connects the plurality of rollers; and

a turntable placed on a bottom surface of the heating chamber via the plurality of rollers,

the turntable has:

and a first radial movement restricting section provided on the bottom surface of the turntable on an inner circumferential side of a track on which the plurality of rollers roll in the circumferential direction, the first radial movement restricting section restricting movement of the plurality of rollers in the radial direction.

In addition, in the heating cooker of one embodiment,

the turntable has:

and a second radial movement restricting portion that is provided on the outer peripheral side of the track on the bottom surface of the turntable and restricts movement of the plurality of rollers outward in the radial direction.

In addition, in the heating cooker of one embodiment,

the turntable has:

and a third radial movement restricting portion that is provided on the bottom surface of the turntable on the outer peripheral side of the second radial movement restricting portion and restricts movement to the outer peripheral side with respect to the plurality of rollers.

In addition, in the heating cooker of one embodiment,

the structure is as follows: the turn table is pulled radially outward while at least one of the plurality of rollers is in contact with the second radial movement restricting portion or after that, the other of the plurality of rollers is in contact with the first radial movement restricting portion.

In addition, in the heating cooker of one embodiment,

the first and second radial movement restricting portions of the turntable are each an annular projection projecting downward,

the height of the first radial movement restricting portion with respect to the bottom surface of the turntable is lower than the height of the second radial movement restricting portion with respect to the bottom surface of the turntable.

In addition, a heating cooker according to an embodiment includes:

a main body casing in which the heating chamber is arranged,

the main body casing has a horizontal door that opens and closes an opening of a front surface of the heating chamber.

In addition, in the heating cooker of one embodiment,

the main body case is a built-in type.

Effects of the invention

As is apparent from the above description, according to the present invention, the first radial movement restricting portion provided on the bottom surface of the turn table and on the inner circumferential side of the track on which the plurality of rollers roll in the circumferential direction restricts the movement of the plurality of rollers to the radially inner side, while the second radial movement restricting portion provided on the bottom surface of the turn table and on the outer circumferential side of the track restricts the movement of the plurality of rollers to the radially outer side, whereby the cooking device capable of preventing the turn table from slipping off the heating chamber with a simple configuration can be realized.

Drawings

Fig. 1 is a perspective view of a microwave oven as an example of a heating cooker according to a first embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of the microwave oven.

Fig. 3 is a back perspective view of the turntable and the roller base of the microwave oven.

Fig. 4 is a rear view of the turntable and the roller holder as viewed from below.

Fig. 5 is a sectional view taken along line V-V of fig. 4.

Fig. 6 is a schematic view showing the upper surface of the turntable.

Fig. 7 is a schematic view showing a state where the turntable is displaced downward from the state of fig. 6.

Fig. 8 is a longitudinal sectional view of a main portion as viewed from a line VIII-VIII of fig. 6.

Fig. 9 is a longitudinal sectional view of a main portion viewed from a line IX-IX of fig. 7.

Fig. 10 is a schematic view showing a state in which the turn table is displaced downward from the state in which the position of the roller base is different from that of fig. 7.

Fig. 11 is a schematic view showing the upper surfaces of the turntable and the roller holder of the comparative example.

Fig. 12 is a schematic view showing a state where the turntable is displaced downward.

Fig. 13 is a longitudinal sectional view of a main portion viewed from XIII-XIII line of fig. 11.

Fig. 14 is a longitudinal sectional view of a main portion as viewed from the XIV-XIV line of fig. 11.

Fig. 15 is a schematic view showing the upper surface of a turntable of a microwave oven as an example of a heating cooker according to a third embodiment of the present invention.

Fig. 16 is a schematic view showing a state in which the turntable is displaced downward from the state of fig. 15.

Fig. 17 is a schematic view showing a state in which the turn table is displaced downward from the state in which the position of the roller base is different from that in fig. 16.

Detailed Description

Hereinafter, a heating cooker according to the present invention will be described in detail with reference to the illustrated embodiments.

[ first embodiment ]

As shown in fig. 1, the microwave oven according to the first embodiment includes: a main body casing 1, a heating chamber 2 provided in the main body casing 1 and having an opening 2a in a front surface thereof, and a horizontally-opening door 3 for opening and closing the opening 2a of the heating chamber 2. The microwave oven is of a built-in type.

The lateral opening door 3 is pivotally attached to the front surface side of the main body casing 1 with the left side as an axis. The horizontally opening door 3 is provided with heat-resistant transparent glass 4. Further, an operation panel 5 is provided on the right side of the front surface of the main body casing 1. The operation panel 5 includes a display unit and a button group.

A turntable 100 for placing an object to be heated is accommodated in the bottom surface 10 of the heating chamber 2. The turntable 100 is made of heat-resistant glass, ceramic, or the like.

Fig. 2 is a longitudinal sectional view of the microwave oven. As shown in fig. 2, a roller holder 200 is rotatably disposed on a bottom surface 10 of the heating chamber 2 disposed in the main body casing 1. The turntable 100 is supported by the roller base 200.

The roller holder 200 includes: three arms 201 as an example of the coupling member, and three rollers 202 rotatably attached to the distal ends of the respective arms 201.

Further, the tip of the rotation shaft 301 is connected to the center of the roller holder 200. A gear box 302 connected to the lower end of the rotary shaft 301 and a motor 303 for driving the rotary shaft 301 via the gear box 302 are disposed below the heating chamber 2.

Fig. 3 is a rear perspective view of the turntable 100 and the roller base 200 of the microwave oven.

As shown in fig. 3, the roller holder 200 has: three arms 201 connected to each other at intervals of 120 ° from the center and extending radially, and three rollers 202 attached to the tips of the arms 201. The three rollers 202 are arranged on the bottom surface 10 of the heating chamber 2 at intervals in the circumferential direction. In fig. 3, a coupling portion of the rotating shaft 301 (shown in fig. 2) to which the roller holder 200 is coupled is omitted.

On the bottom surface of the turntable 100, on the inner circumferential side of a track on which the plurality of rollers 202 roll in the circumferential direction, a first radial movement restricting section 101 in an annular shape that restricts the movement of the plurality of rollers 202 inward in the radial direction is provided in a concentric circle shape having the same center as the turntable 100 (see fig. 5).

Further, on the bottom surface of the turntable 100 and on the outer peripheral side of the track, a second radial movement restricting portion 102 in an annular shape that restricts movement of the plurality of rollers 202 in the radial direction outward is provided in a concentric circle shape having the same center as the turntable 100 (see fig. 5).

Further, on the bottom surface of the turntable 100 and on the outer peripheral side of the second radial movement restriction portion 102, an annular third radial movement restriction portion 103 that restricts movement to the outer peripheral side with respect to the plurality of rollers 202 is provided in a concentric circle shape having the same center as the turntable 100 (see fig. 5).

The first to third radial

movement restricting portions

101, 102, and 103 are annular convex portions that protrude downward of the turntable 100.

In the first embodiment, the raceway surface on which the plurality of rollers 202 roll in the circumferential direction is provided on the same plane as the bottom surface of the turret 100, but the raceway surface of the roller may be a groove-shaped bottom portion recessed from the bottom surface of the turret.

Fig. 4 is a rear view of the turntable 100 and the roller base 200 as viewed from below. The same components as those in fig. 5 are denoted by the same reference numerals.

Fig. 5 is a cross-sectional view taken along line V-V of fig. 4, where the lower side in fig. 5 is the upper side (the top surface side of the heating chamber 2 shown in fig. 1 and 2), and the upper side in fig. 5 is the lower side (the bottom surface 10 side of the heating chamber 2 shown in fig. 1 and 2). In fig. 5, the same components as those in fig. 3 and 4 are denoted by the same reference numerals.

As shown in fig. 5, the roller 202 at the tip end of the arm 201 rolls on a track interposed between the first radial movement restricting portion 101 and the second radial movement restricting portion 102 of the turn table 100. At this time, the plurality of rollers 202 roll on the bottom surface 10 (shown in fig. 1 and 2) of the heating chamber 2.

Fig. 6 shows the upper surface of the turntable 100. In fig. 6, R1 denotes a ridge line of the first radial movement restricting section 101 shown in fig. 3 on the back surface of the turntable 100, R2 denotes a ridge line of the second radial movement restricting section 102 shown in fig. 3 on the back surface of the turntable 100, and R3 denotes a ridge line of the third radial movement restricting section 103 shown in fig. 3 on the back surface of the turntable 100. Here, the ridgelines R1 to R3 are loci linking the maximum height positions in the circumferential direction of the first to third radial movement restricting portions 101 to 103, respectively.

In fig. 6, on the back side of the turntable 100, the three rollers 202 of the roller base 200 are in the correct positions on the track for them to roll in the circumferential direction. One of the three arms 201 of the roller base 200 is disposed toward the rear side (the upper side in fig. 6 (the deep side of the heating chamber 2)) in the front-rear direction, and the other two arms 201 are disposed at positions opened by 60 ° to the left and right with respect to the front.

Here, the distance between a straight line a1 connecting the centers of the two rollers 202 on the lower side in the figure of the three rollers 202 and a straight line B1 parallel to the straight line and passing through the center of gravity O of the turn table 100 is L1, and the weight of the turn table 100 is m. a load applied by pressing down near the lower edge of the turn table 100 (on the opening 2a side of the heating chamber 2 shown in fig. 1 and 2) causes the turn table 100 to rotate about the straight line a1, that is, a rotation torque greater than the rotation torque M ×L 1 is required about the centers of the two rollers 202 on the lower side in the figure.

Next, fig. 7 is a schematic view showing a state where the turntable 100 is displaced downward from the state shown in fig. 6. In fig. 7, the lower side is the opening 2a side of the heating chamber 2 shown in fig. 1 and 2, and the upper side is the depth side of the heating chamber 2.

In fig. 7, the turret 100 is tested under test conditions defined by the IEC standard below.

"< IEC Specification 60335-2-25 (subbold 22.118) >)

A container (maximum thickness 3mm, outer diameter about 190) of a cylinder made of borosilicate glass filled with 1000 g. + -.50 g of cold watermm, a height of about 90mm and a curvature of the outsole of about 5mm) is placed on a turntable, and from 0[ N (kg. m/s) is applied to the upper part of the container of the cylinder²)]Increasing to a maximum of 10[ N (kg. m/s) ]²)]And pulls the container out of the chamber without lifting it from the turntable. "

Under the above-described test conditions, as shown in fig. 7, when the turntable 100 is pulled and displaced downward in the figure (toward the opening 2a of the heating chamber 2 shown in fig. 1 and 2) and one of the rollers 202 on the upper side in the figure passes over the second radial movement restricting portion 102 on the outer side of the track, the other two rollers 202 are locked to the first radial movement restricting portions 101 on the inner side of the track, respectively.

This prevents the turret 100 from being pulled by the container, being separated from the plurality of rollers 202, and being thrown out to the outside. Therefore, according to the microwave oven, the turntable 100 can be prevented from slipping off the heating chamber 2 with a simple configuration.

Here, the distance between a straight line a2 connecting the centers of the two rollers 202 on the lower side in the figure among the three rollers 202 and a straight line B2 parallel to the straight line and passing through the center of gravity O of the turn table 100 is L2, and the weight of the turn table 100 is M, and a pressing load is applied near the edge of the lower side of the turn table 100 (on the opening 2a side of the heating chamber 2) to pivot the turn table 100 about the straight line a2, that is, a rotational torque greater than the rotational torque M ×L 2 is required for the turning about the centers of the two rollers 202 on the lower side in the figure, and the distance L2 at this time is slightly shorter than the distance L1 in fig. 6, but there is no large difference in the rotational torques.

Therefore, by setting the weight M and the distance L2 of the turntable 100 so that the above-described rotation moment M ×L 2 is larger than the rotation moment generated by the load of the container, the turntable 100 does not tilt under the above-described test conditions even if the container slides on the turntable 100 and moves to the vicinity of the edge on the lower side in the drawing of the turntable 100.

Fig. 8 is a longitudinal sectional view taken along line VIII-VIII of fig. 6. In fig. 8, the same components as those in fig. 3 and 4 are denoted by the same reference numerals. In fig. 8, the direction is opposite to the vertical direction in fig. 5, that is, the lower side in fig. 8 is the lower side (the bottom surface 10 side of the heating chamber 2 shown in fig. 1 and 2), and the upper side in fig. 8 is the upper side (the top surface side of the heating chamber 2 shown in fig. 1 and 2).

In fig. 8, on the back side of the turntable 100, the three rollers 202 of the roller base 200 are in the correct positions on the track for them to roll in the circumferential direction.

Here, the height H1 of the first radial movement restricting portion 101 with respect to the bottom surface of the turntable 100 is set to be lower than the height H2 of the second radial movement restricting portion 102 with respect to the bottom surface of the turntable 100. Thus, the arm 201 connecting the plurality of rollers 202 does not interfere with the first radial movement restricting portion 101.

Fig. 9 is a vertical cross-sectional view taken along line IX-IX in fig. 7, and the turntable 100 is in a state of being pulled and displaced leftward in the drawing (toward the opening 2a of the heating chamber 2 shown in fig. 1 and 2), and the roller 202 passes over the second radial movement restricting portion 102 on the outer side of the track. The other two rollers 202 are locked to the first radial movement restricting portions 101 on the inner side of the track, respectively.

At this time, the roller 202 that has passed over the second radial movement restriction portion 102 is sandwiched and locked between the second radial movement restriction portion 102 and the third radial movement restriction portion 103. The locking of the roller 202 beyond the second radial movement restricting portion 102 (between the second radial movement restricting portion 102 and the third radial movement restricting portion 103) and the locking of the other two rollers 202 with the first radial movement restricting portion 101 interact with each other, so that the locking force of the three rollers 202 with respect to the turntable 100 is enhanced, and the turntable 100 can be more reliably prevented from flying out to the outside.

Fig. 10 is a schematic view showing a state in which the position of the roller 202 is shifted downward (toward the opening 2a of the heating chamber 2 shown in fig. 1 and 2) from that of the turn table 100 shown in fig. 7. In fig. 10, the lower side is the opening 2a side of the heating chamber 2, and the upper side is the depth side of the heating chamber 2.

In the roller holder 200 of fig. 10, one arm 201 is disposed at a position facing the opening 2a side of the heating chamber 2, and the other two arms 201 are disposed at positions opened by 60 ° to the left and right with respect to the rear.

Under the test conditions of IEC standard 60335-2-25(subclause22.118), as shown in fig. 10, when the turn table 100 is pulled and displaced downward in the drawing (toward the opening 2a of the heating chamber 2), one of the rollers 202 on the lower side in the drawing is locked to the first radial movement restricting portion 101 on the inner side of the rail, and the other two rollers 202 are respectively locked to the second radial movement restricting portions 102 on the outer side of the rail.

Therefore, in the arrangement of the roller holder 200 shown in fig. 10, the locking of one roller 202 to the first radial movement restricting portion 101 and the locking of the other two rollers 202 to the second radial movement restricting portion 102 interact with each other, so that the locking force of the three rollers 202 to the turn table 100 is enhanced, and the turn table 100 can be more reliably prevented from flying out to the outside.

Further, if the distance between the straight line A3 passing through the center of the lower roller 202 in the figure among the three rollers 202 and extending in the tangential direction and the straight line B3 parallel to the straight line A3 and passing through the center of gravity O of the turn table 100 is L3, and the weight of the turn table 100 is M, the rotational moment of the turn table 100 about the straight line A3 is M ×L 3, which is much larger than M ×L 1 in fig. 7.

Therefore, by setting the weight M and the distance L3 of the turntable 100 so that the rotational moment M ×L 3 becomes larger than the rotational moment generated by the load of the container, the turntable 100 does not tilt under the above-described test conditions even if the container slides on the turntable 100 and moves to the vicinity of the edge on the lower side in the figure of the turntable 100.

< comparative example >

Fig. 11 shows a schematic view showing the upper surfaces of the turn table 1100 and the roller holder 200 of the comparative example. The turntable 1100 of fig. 11 has the same configuration as the turntable 100 shown in fig. 3 and 4 except that the first radial movement restricting portion 101 is not provided, and the same components are denoted by the same reference numerals. The comparative example is a comparative example explained for easy understanding of the heating cooker of the present invention, and is not the heating cooker of the present invention.

In fig. 11, on the back side of the turntable 1100, the three rollers 202 of the roller base 200 are in the correct positions on the track for them to roll in the circumferential direction.

Next, fig. 12 shows a schematic diagram illustrating a state in which the turntable 1100 is displaced downward. In fig. 12, the lower side is the opening 2a side of the heating chamber 2, and the upper side is the depth side of the heating chamber 2.

Under the test conditions of IEC specification 60335-2-25(subclause22.118), as shown in fig. 12, when the turn table 1100 is pulled downward in the figure (toward the opening 2a of the heating chamber 2) and displaced, when the upper roller 202 in the figure passes over the second radial movement restricting portion 102 on the outer side of the track, the other two rollers 202 are not locked at any place.

Therefore, in this comparative example, the turret 1100 was separated from the plurality of rollers 202 and was thrown outward in the test of IEC standard 60335-2-25 (subcoke 22.118).

FIG. 13 is a longitudinal sectional view taken along line XIII-XIII in FIG. 11. In fig. 13, in the back side of the turntable 1100, the three rollers 202 of the roller base 200 are in the correct positions on the track for them to roll in the circumferential direction.

Fig. 14 is a longitudinal sectional view taken along the line XIV-XIV in fig. 11. In fig. 14, the turntable 100 is in a state of being pulled leftward in the drawing and shifted, and the roller 202 passes over the second and third radial

movement restricting portions

102 and 103 on the outer side of the track.

Thus, in the comparative example, the turntable 1100 cannot be prevented from flying out to the outside.

In contrast, in the microwave oven according to the first embodiment, the movement of the plurality of rollers 202 in the radial direction is restricted by the first radial movement restricting portion 101 provided on the bottom surface of the turntable 100 and on the inner circumferential side of the track on which the plurality of rollers 202 roll in the circumferential direction, and the movement of the plurality of rollers 202 in the radial direction is restricted by the second radial movement restricting portion 102 provided on the bottom surface of the turntable 100 and on the outer circumferential side of the track. Thus, when a force is applied to pull the turntable 100 in the horizontal direction to shift the turntable 100, any one of the plurality of rollers 202 is locked to the second radial movement restricting portion 102 on the outer side of the track, and the horizontal shift of the turntable 100 can be prevented. Further, when the force for pulling the turn table 100 in the horizontal direction to shift the turn table 100 is increased and any one of the plurality of rollers 202 passes over the second radial movement restricting portion 102 on the outer side of the track, the other roller 202 is locked to the first radial movement restricting portion 101 on the inner side of the track.

In this way, even if any of the plurality of rollers 202 passes over the second radial movement restricting portion 102 on the outer side of the track, the other roller 202 is locked to the first radial movement restricting portion 101 on the inner side of the track, and the movement of the turntable 100 can be restricted. Therefore, the turntable 100 can be prevented from slipping off the heating chamber 2 by a simple configuration, and a microwave oven compatible with IEC standard 60335-2-25(subclause22.118) can be provided.

Further, since the third radial movement restricting portion 103 provided on the bottom surface of the turn table 100 and on the outer peripheral side of the second radial movement restricting portion 102 restricts the movement of the turn table 100 to the outer peripheral side with respect to the plurality of rollers 202, even when a force that pulls the turn table 100 in the horizontal direction to shift the turn table 100 acts, the movement of the rollers 202 to the outer peripheral side can be restricted by the third radial movement restricting portion 103 on the outer side even if any of the plurality of rollers 202 passes over the second radial movement restricting portion 102 on the outer side of the track, and the turn table 100 can be reliably prevented from slipping off the heating chamber 2.

Further, when the turn table 100 is pulled radially outward, in a state where at least one of the plurality of rollers 202 comes into contact with the second radial movement restricting portion 102 and then moves beyond the second radial movement restricting portion 102, the other two rollers 202 of the plurality of rollers 202 are locked with the first radial movement restricting portion 101, and thus the turn table 100 can be easily prevented from slipping off the heating chamber 2.

Further, when the turn table 100 is pulled radially outward, at least one of the plurality of rollers 202 may be in contact with the second radial movement restricting portion 102, and the other two rollers 202 of the plurality of rollers 202 may be locked to the first radial movement restricting portion 101.

Further, by setting the height H1 of the first radial movement restricting portion 101 with respect to the bottom surface of the turn table 100 to be lower than the height H2 of the second radial movement restricting portion 102 with respect to the bottom surface of the turn table 100, the arm 201 connecting the plurality of rollers 202 is less likely to interfere with the first radial movement restricting portion 101, and the degree of freedom in design is increased.

In addition, in the microwave oven including the main body case 1 having the horizontally-opening door 3 that opens and closes the opening 2a of the front surface, the turntable 100 may fall forward when being erroneously pulled out from the opening 2a of the front surface of the heating chamber 2 of the main body case 1.

In the microwave oven including the main body case 1 having the horizontally-opening door 3 having the opening 2a for opening and closing the front surface of the heating chamber 2, the first embodiment described above can easily correspond to IEC standard 60335-2-25 (subsimply 22.118), and the turntable 100 can be prevented from falling forward.

In the microwave oven including the built-in type main body casing 1, if the turntable 100 is erroneously pulled out from the opening 2a in the front surface of the heating chamber 2 of the main body casing 1, there is no flat installation surface in the front, and the turntable may directly fall down.

Such a microwave oven including the built-in type main body case 1 can easily correspond to IEC specification 60335-2-25(subclause22.118), and can prevent the turntable 100 from falling forward.

[ second embodiment ]

A microwave oven as an example of a heating cooker according to a second embodiment of the present invention has the same configuration as the microwave oven according to the first embodiment except that the third radial movement restricting portion 103 is not provided, and fig. 1 to 10 are referred to.

As shown in fig. 7, in the microwave oven according to the second embodiment, when the turntable 100 is pulled and displaced downward in the figure (toward the opening 2a of the heating chamber 2 shown in fig. 1 and 2), when one roller 202 on the upper side in the figure passes over the second radial movement restricting portion 102 on the outer side of the track, the other two rollers 202 are locked to the first radial movement restricting portion 101 on the inner side of the track, respectively.

Under the test conditions of IEC standard 60335-2-25(subclause22.118), as shown in fig. 10, when the turn table 100 is pulled downward in the figure (toward the opening 2a of the heating chamber 2) and displaced, one of the rollers 202 at the lower side in the figure is locked to the first radial movement restricting portion 101 at the inner side of the track, and the other two rollers 202 are respectively locked to the second radial movement restricting portions 102 at the outer side of the track.

According to the microwave oven of the second embodiment, the turntable 100 can be prevented from slipping off the heating chamber 2 by a simple configuration.

The microwave oven according to the second embodiment has the same effects as those of the microwave oven according to the first embodiment, except for the effect of the third radial movement restricting portion 103.

[ third embodiment ]

Fig. 15 shows an upper surface of a turntable 400 of a microwave oven as an example of a heating cooker according to a third embodiment of the present invention. The microwave oven according to the third embodiment has the same configuration as the microwave oven according to the first embodiment except that the second and third radial

movement restricting portions

102 and 103 are not provided, and fig. 1 to 10 are referred to. In fig. 15, the same components as those in fig. 1 to 10 are denoted by the same reference numerals.

Fig. 15 shows the upper surface of the turntable 400. In fig. 15, R1 represents a ridge line of the first radial movement restricting portion 101 shown in fig. 3 on the back surface of the turntable 400. Here, the ridge line R1 is a locus connecting the maximum height positions of the first to third radial movement restricting portions 101 in the circumferential direction.

In fig. 15, on the back side of the turntable 400, the three rollers 202 of the roller base 200 are in the correct positions on the track for them to roll in the circumferential direction.

In the microwave oven according to the third embodiment, under the test conditions of IEC standard 60335-2-25(subclause22.118), when the turn table 400 is pulled and displaced downward in the figure (toward the opening 2a of the heating chamber 2 shown in fig. 1 and 2) as shown in fig. 16 from the state of fig. 15, two of the three rollers 202 are locked to the first radial movement restricting portion 101 on the inner side of the track.

Fig. 17 is a schematic view showing a state in which the turn table 400 is shifted downward (toward the opening 2a of the heating chamber 2) in a position different from that of fig. 16 for the roller 202. In fig. 17, the same components as those in fig. 1 to 10 are denoted by the same reference numerals, and the lower side is the opening 2a side of the heating chamber 2, and the upper side is the depth side of the heating chamber 2.

In the roller holder 200 of fig. 17, one arm 201 is disposed at a position facing the opening 2a side of the heating chamber 2, and the other two arms 201 are disposed at positions opened by 60 ° to the left and right with respect to the rear.

Under the test conditions of IEC standard 60335-2-25 (subfloat 22.118), as shown in fig. 17, when the turn table 400 is pulled downward in the figure (toward the opening 2a of the heating chamber 2) and is displaced, the lower roller 202 in the figure is locked to the first radial movement restricting portion 101 on the inner side of the rail.

According to the microwave oven of the third embodiment, the turntable 100 can be prevented from slipping off the heating chamber 2 with a simple configuration.

In the case of fig. 16, when the distance between a straight line a2 passing through the center of the lower one of the three rollers 202 in the drawing and extending in the tangential direction and a straight line B2 parallel to the straight line a2 and passing through the center of gravity O of the turret 400 is L2, and the weight of the turret 400 is M, the rotational moment of the turret 400 about the straight line a2 is M ×L 2.

On the other hand, in the case of fig. 17, when the distance between a straight line A3 passing through the center of the lower one of the three rollers 202 in the drawing and extending in the tangential direction and a straight line B3 parallel to the straight line A3 and passing through the center of gravity O of the turn table 400 is L3, and the weight of the turn table 400 is M, the rotational torque of the turn table 400 about the straight line A3 is M ×L 3, which is much larger than that of fig. 16.

Therefore, by setting the weight M and the distance L2 of the turntable 100 so that the above-described rotational moment M ×L 2 is larger than the rotational moment generated by the load of the container, the turntable 100 does not tilt under the above-described test conditions even if the container slides on the turntable 100 and moves to the vicinity of the edge on the lower side in the drawing of the turntable 100.

The microwave oven according to the third embodiment has the same effects as those of the microwave oven according to the first embodiment, except for the effects of the second and third radial

movement restricting portions

102 and 103.

[ fourth embodiment ]

A microwave oven as an example of a heating cooker according to a fourth embodiment of the present invention has the same configuration as the microwave oven according to the first embodiment except that the height of the first radial movement restriction portion is different from the height of the second radial movement restriction portion.

In the microwave oven according to the fourth embodiment, the annular first radial movement restricting portion that restricts the movement of the plurality of rollers inward in the radial direction is provided concentrically with the turntable at the center on the bottom surface of the turntable and on the inner peripheral side of the track on which the plurality of rollers roll in the circumferential direction.

Further, an annular second radial movement restricting portion for restricting movement of the plurality of rollers outward in the radial direction is provided on the bottom surface of the turntable and on the outer peripheral side of the track in a concentric circle shape having the same center as the turntable.

The height of the first radial movement limiting part relative to the bottom surface of the turntable is made higher than the height of the second radial movement limiting part relative to the bottom surface of the turntable. This strengthens the locking force between the plurality of rollers and the first radial movement restricting portion.

In the fourth embodiment, the arm coupled to the roller is configured not to contact or interfere with the first radial movement restricting portion.

The microwave oven of the fourth embodiment described above has the same effects as those of the microwave oven of the first embodiment.

In the first to fourth embodiments, the microwave oven as the heating cooker was described, but the present invention may be applied to other heating cookers such as an oven.

In the first to fourth embodiments, the microwave oven including the roller holder 200 having the three arms 201 extending radially has been described, but the configuration of the roller holder is not limited to this, and a heating cooker in which a plurality of rollers are rotatably attached to a ring-shaped coupling member may be used.

In the first to fourth embodiments, the annular convex portions protruding downward and provided on the bottom surface of the turntable 100 are the first to third radial movement restricting portions 101 to 103, but the first to third radial movement restricting portions are not limited to this, and may be radial movement restricting portions of other forms.

While the present invention has been described with reference to the specific embodiments, the present invention is not limited to the first to fourth embodiments, and can be implemented with various modifications within the scope of the present invention. For example, the contents described in the first to fourth embodiments may be combined as appropriate as an embodiment of the present invention.

The present invention and embodiments are summarized as follows.

The heating cooker of the present invention is characterized by comprising:

a heating chamber 2;

a plurality of rollers 202 arranged at intervals in the circumferential direction on the bottom surface of the heating chamber 2;

a connecting member 201 for connecting the plurality of rollers 202; and

a turntable 100 placed on the bottom surface of the heating chamber 2 via the plurality of rollers 202,

the turntable 100 includes:

and a first radial movement restricting section 101 provided on the bottom surface of the turret 100 on the inner circumferential side of a track on which the plurality of rollers 202 roll in the circumferential direction, and restricting the movement of the plurality of rollers 202 inward in the radial direction.

According to the above configuration, the first radial movement restricting portion 101 provided on the bottom surface of the turntable 100 and on the inner circumferential side of the track along which the plurality of rollers 202 roll in the circumferential direction restricts the movement of the plurality of rollers 202 toward the inside in the radial direction. For example, when a force pulling in the horizontal direction acts on the turntable 100 to displace the turntable 100, the roller 202 is locked to the first radial movement restricting portion 101 on the inner side of the track. Thus, the movement of the turntable 100 can be restricted. Therefore, the turntable 100 can be prevented from slipping off the heating chamber 2 with a simple configuration.

In addition, in the heating cooker of one embodiment,

the turntable 100 includes:

and a second radial movement restricting portion 102 provided on the bottom surface of the turntable 100 on the outer peripheral side of the track and restricting radially outward movement of the plurality of rollers 202.

According to the above embodiment, the movement of the plurality of rollers 202 in the radial direction is restricted by the first radial movement restricting portion 101 provided on the bottom surface of the turn table 100 and on the inner circumferential side of the track on which the plurality of rollers 202 roll in the circumferential direction, and the movement of the plurality of rollers 202 in the radial direction is restricted by the second radial movement restricting portion 102 provided on the bottom surface of the turn table 100 and on the outer circumferential side of the track. For example, when a force to shift the turntable 100 by pulling the turntable 100 in the horizontal direction acts, one of the plurality of rollers 202 is locked to the second radial movement restricting portion 102 on the outer side of the track, and when a strong force acts to cause the roller 202 to pass over the second radial movement restricting portion 102, the other roller 202 is locked to the first radial movement restricting portion 101 on the inner side of the track. In this way, even if any of the plurality of rollers 202 passes over the second radial movement restricting portion 102 on the outer side of the track, the other roller 202 is locked to the first radial movement restricting portion 101 on the inner side of the track, and the movement of the turntable 100 can be restricted.

In addition, in the heating cooker of one embodiment,

the turntable 100 includes:

and a third radial movement restricting portion 103 provided on the bottom surface of the turntable 100 on the outer circumferential side of the second radial movement restricting portion 102 and restricting movement on the outer circumferential side with respect to the plurality of rollers 202.

According to the above embodiment, since the movement of the plurality of rollers 202 toward the outer circumferential side is restricted by the third radial movement restricting portion 103 provided on the bottom surface of the turn table 100 and on the outer circumferential side of the second radial movement restricting portion 102, even if any of the plurality of rollers 202 crosses the outer second radial movement restricting portion 102 of the track when a force to displace the turn table 100 is applied by pulling the turn table 100 in the horizontal direction, the movement of the rollers 202 toward the outer circumferential side can be restricted by the third radial movement restricting portion 103 on the outer side, and the turn table 100 can be reliably prevented from slipping off from the heating chamber 2.

In addition, in the heating cooker of one embodiment,

the structure is as follows: the turn table 100 is pulled radially outward so that at least one roller 202 of the plurality of rollers 202 comes into contact with the second radial movement restricting portion 102, and at the same time or after that, the other rollers 202 of the plurality of rollers 202 come into contact with the first radial movement restricting portion 101.

According to the above embodiment, when the turn table 100 is pulled radially outward, at least one roller 202 of the plurality of rollers 202 comes into contact with the second radial movement restricting portion 102, and the other rollers 202 of the plurality of rollers 202 are locked to the first radial movement restricting portion 101. Alternatively, when the turn table 100 is pulled radially outward, after at least one of the plurality of rollers 202 comes into contact with the second radial movement restricting portion 102, the other roller 202 of the plurality of rollers 202 is locked to the first radial movement restricting portion 101. This can easily prevent the turntable 100 from slipping off the heating chamber 2.

In addition, in the heating cooker of one embodiment,

the first and second radial

movement restricting portions

101 and 102 of the turntable 100 are annular projecting portions projecting downward,

the height of the first radial movement restricting portion 101 with respect to the bottom surface of the turntable 100 is lower than the height of the second radial movement restricting portion 102 with respect to the bottom surface of the turntable 100.

According to the above embodiment, the height of the first radial movement restricting portion 101 with respect to the bottom surface of the turn table 100 is made lower than the height of the second radial movement restricting portion 102 with respect to the bottom surface of the turn table 100, so that the coupling member 201 that couples the plurality of rollers 202 is less likely to interfere with the first radial movement restricting portion 101, and the degree of freedom in design is increased.

In addition, in the heating cooker of one embodiment,

the disclosed device is provided with: a main body casing 1 in which the heating chamber 2 is arranged,

the main body casing 1 has a horizontally-opening door 3 that opens and closes an opening 2a in the front surface of the heating chamber 2.

In the heating cooker including the main body casing 1 having the horizontally-opening door 3 that opens and closes the opening 2a of the front surface, the turntable 100 may fall forward when being erroneously pulled out from the opening 2a of the front surface of the heating chamber 2 of the main body casing 1.

According to the above embodiment, in the heating cooker including the main body casing 1 having the horizontally-opening door 3 having the opening 2a for opening and closing the front surface of the heating chamber 2, it is possible to easily correspond to IEC specification 60335-2-25 (subsimply 22.118), and it is possible to prevent the turntable 100 from falling forward.

In addition, in the heating cooker of one embodiment,

the main body case 1 is a built-in type.

In the heating cooker including the built-in type main body casing 1, when the turntable 100 is erroneously pulled out from the opening 2a in the front surface of the heating chamber 2 of the main body casing 1, there is a possibility that a flat installation surface portion is not provided in the front, and the turntable may directly fall down.

According to the above embodiment, the heating cooker including the built-in type main body casing 1 can easily correspond to IEC specification 60335-2-25(subclause22.118), and can prevent the turntable 100 from falling forward.

Description of the symbols

1 … Main body case

2 … heating chamber

2a … opening

3 … horizontal opening door

4 … glass

5 … operation panel

10 … bottom surface

100,400 … rotary table

101 … first radial movement restriction

102 … second radial movement restriction

103 … third radial movement restriction

200 … roller seat

201 … arm

202 … roller

301 … rotation axis

302 … gearbox 303 … motor

Claims

1. A heating cooker is characterized by comprising:

a heating chamber;

a connecting member that connects the plurality of rollers; and

the turntable has:

a first radial movement restricting section that is provided on the bottom surface of the turntable on the inner circumferential side of a track on which the plurality of rollers roll in the circumferential direction, and that restricts movement of the plurality of rollers inward in the radial direction;

a second radial movement restricting section that is provided on the outer peripheral side of the track on the bottom surface of the turntable and restricts movement of the plurality of rollers outward in the radial direction;

a third radial movement restricting portion that is provided on the bottom surface of the turntable on the outer peripheral side of the second radial movement restricting portion and restricts movement thereof on the outer peripheral side with respect to the plurality of rollers,

when any one of the plurality of rollers is positioned between the second radial movement restricting portion and the third radial movement restricting portion, the roller is pinched and locked between the second radial movement restricting portion and the third radial movement restricting portion, and the other roller of the plurality of rollers is locked by the first radial movement restricting portion.

2. The heating cooker according to claim 1,

the first radial movement restricting portion and the second radial movement restricting portion of the turntable are annular convex portions projecting downward,

the height of the first radial movement limiting portion with respect to the bottom surface of the turntable is lower than the height of the second radial movement limiting portion with respect to the bottom surface of the turntable.

3. The heating cooker according to claim 1 or 2, comprising:

a main body casing in which the heating chamber is arranged,